Two-cylinder vertical shaft internal combustion engine



FIG. 1 is a left front perspective view of a two-cylinder vertical shaft internal combustion engine showing my new design;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a left side perspective view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a front elevational view thereof; and

FIG. 6 is a rear elevational view thereof. _

The broken lines in the drawing are for illustrative purposes only. 

The ornamental design for a two cylinder vertical shaft internal combustion engine, as shown and described. 